Refer to the figure below. Growing 1,000 bushels of wheat and no bushels of corn each year is:

题目：Refer to the figure below. Growing 1,000 bushels of wheat and no bushels of corn each year is:

Refer to the figure below. Growing 1,000 bushels of wheat and no bushels of corn each year is:

A.efficient and attainable.

B.efficient but unattainable.

C.inefficient and unattainable.

D.inefficient but attainable.


正确答案：efficient and attainable.